They drop a lot of feathers as they molt. I find I can hardly walk through the yard without stopping to pick up a few to tie with. I have a jar at my station I stick them in. I'll throw up a few patterns I've used them in later.
The swedish blue on the upper left is a male\drake and the redish rooster rips into it a few times a day to let him know who's in charge. So I have a few nice clumps of feathers from the tail end that I think will work for cdc.